Ibrahim, D.A. et al. 2026. Defect-Mediated Cobalt-Doped SnO₂ Nanostructures for Enhanced Visible-Light Photocatalytic Degradation. UMYU Scientifica. 5, 1 (Mar. 2026), 276–283. DOI:https://doi.org/10.56919/usci.2651.023.